import java.io.UnsupportedEncodingException;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

public class test {

	static public void main(String args[])
		{		
			
			System.out.println(System.getProperty("user.home"));
			System.out.println(System.getProperty("os.name"));
			System.out.println(System.getProperty("os.version"));
			System.out.print("a");
			System.out.print("b");
			try {
				String str = "好东西";

				String str1 = java.net.URLEncoder.encode(str, "utf-8");

				System.out.println(str1);

				String str2;
				str2 = java.net.URLDecoder.decode(str1, "utf-8");
				System.out.println(str2);
			} catch (UnsupportedEncodingException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

		}
}
